PNG
PNG is a lossless raster-image file format supporting indexed, grayscale, and truecolor images, with optional transparency and metadata.
Learn Go with Pocket-Sized Projects
PNG is a lossless raster image file format that supports indexed, grayscale, and truecolor images with optional transparency.
- How it is used
- Preserves exact pixel colors when raster data represents maze walls, paths, entrances, and treasures.
- How deep it goes
- Explains raster pixels, RGBA access, decoding, encoding, and scan order without detailing PNG compression internals.
- Examples
- Uses a PNG RGBA maze whose explored path is highlighted in a second image.
- What you can do after
- Build a Go tool that decodes, inspects, modifies, and encodes PNG images through standard image packages.
Web Design Playground, Second Edition
PNG is a lossless raster image format that supports indexed, grayscale, and truecolor images, including alpha transparency.
- How it is used
- Deploys PNG for web illustrations, logos, and icons that use solid colors or transparency.
- How deep it goes
- Explains PNG use, color-depth choices, and optimization, but stops short of describing encoding internals.
- Examples
- Uses an atomic-logo.png example, simple logos and icons, 8-bit color, 24-bit palettes, and PNG optimization tools.
- What you can do after
- Apply it via PNG color-depth choices, image optimization tools, and the HTML img element.
Read how Web Design Playground, Second Edition explains PNG →
Related concepts
- JPEGalternative to · JPEG is a raster-image compression and file-format standard commonly using lossy compression for photographs and other continuous-tone images.
- JuicyPixelsused by · JuicyPixels is a Haskell library for decoding, encoding, and manipulating common raster image formats.
- mazeused by · A maze is a spatial puzzle or problem space of connected and obstructed routes in which a path must be found between designated locations.
- RGBA coloruses · An RGBA color is a color representation specifying red, green, blue, and alpha channel values.
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